Sink



FIG. 1 is a front perspective view of a sink, showing our new design.

FIG. 2 is a front elevation view thereof.

FIG. 3 is a rear elevation view thereof.

FIG. 4 is a first side elevation view thereof.

FIG. 5 is a second side elevation view thereof.

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines shown in the drawing views are for illustrativepurposes and form no part of the claim design.

CLAIM The ornamental design for a sink, as shown and described.